Vegetables are stored in winter in northern areas, and a bucket of water is put in the cellar. What kind of water is used?

There are two aspects.

1. Because of the large specific heat capacity of water, a certain quality of water absorbs (or releases) more heat at a certain temperature, which is beneficial to using water as coolant or heat preservation. The former is to let water absorb and take away more heat; The latter is to let water emit more heat.

2. Because of the large specific heat capacity of water, a certain quality of water absorbs (or releases) more heat, but its temperature changes little, which is beneficial to adjust the temperature.